JavaScript libraries market share on brand websites

Libraries loaded on the homepage.

#	Technology	UK brands	United Kingdom	Global
1	jQuery	29%	42%	35%
2	Swiper	15%	12%	12%
3	core-js	12%	17%	11%
4	jQuery Migrate	10%	16%	9.7%
5	Slick	6%	6.7%	5.1%
6	webpack	4.8%	3.8%	2.4%
7	Modernizr	3.2%	4.8%	2.7%
8	lazysizes	2.8%	2.4%	1.9%
9	jQuery UI	2.6%	4.5%	3.3%
10	Alpine.js	2.5%	3.1%	1.5%
11	Owl Carousel	2.2%	4.5%	3.2%
12	GSAP	2%	1.4%	1.8%
13	Vite	1.4%	0.8%	2%
14	Lottie	1.2%	0.7%	0.9%
15	RequireJS	1.1%	2.1%	0.6%
16	Lodash	0.8%	0.4%	0.4%
17	htmx	0.2%	0.3%	0.2%
18	Polyfill.io (compromised CDN)	0.2%	0.2%	<0.1%
19	Hotwire (Turbo / Stimulus)	0.1%	0.4%	0.5%
20	three.js	<0.1%	<0.1%	<0.1%

By site popularity

Share of measured sites in each Tranco popularity band that use the technology: the top 1,000, 10,000 and 100,000 sites and the whole top million.

#	Technology	Top 1K	Top 10K	Top 100K	Top 1M
1	webpack	11%	7.4%	7%	6.8%
2	jQuery	0%	6.6%	17%	20%
3	Swiper	2.6%	5.9%	12%	13%
4	core-js	0%	2.2%	3.8%	5.5%
5	jQuery Migrate	0%	2.2%	3.2%	4.6%
6	Modernizr	0%	1.5%	1.8%	1.7%
7	lazysizes	0%	1.5%	1.4%	1.6%
8	Alpine.js	0%	1.5%	0.6%	1.5%
9	Lottie	0%	1.5%	1%	0.9%
10	Slick	0%	0.7%	2.6%	4.1%
11	jQuery UI	0%	0.7%	1.6%	2%
12	RequireJS	0%	0.7%	0.8%	1.5%
13	Vite	0%	0.7%	1.4%	1.2%
14	Owl Carousel	0%	0%	1%	1.5%
15	Lodash	0%	0%	0.8%	0.9%
16	GSAP	0%	0%	1%	0.7%
	Sites measured	38	136	503	689

Our crawler: 1,359 sites · UK brands · updated 23 Oct 2026 · Methodology